AMETEK MX CTSH - Manual (Page 66)

California Instruments Revision H 66
User Manual MX Series CTSH Compliance Test System
The following checklist shows all available setup options for a Harmonics test.
Field Description / Purpose
Test Category Select between Harmonics or Flicker test. To include interharmonics, select the Inter.
Harm. check box.
Frequency Choose 50 Hz or 60 Hz. This choice will be used to program the AC source output
frequency. If no AC source is available or the AC source control option has not been
selected, the measured frequency is checked against the user setting and an error
message is generated if a discrepancy is detected. For IEC compliance testing, 50 Hz
should be selected.
Test Class Select the appropriate test class for the equipment under test. See paragraph 5.3 for test
class selection.
Voltage Select the correct line voltage. Default choices are 115 and 230 V RMS Line to neutral.
A user-defined value may be entered by selecting the "Other" option. This setting is used
to program the AC power source output voltage. If no AC source is available or the AC
source control setting in the advanced setup screen has not been selected, the operator is
responsible for ensuring the correct line voltage is applied to the EUT.
Load Selects single or three phase mode. Note that a WYE connection must be made between
the MX and the PACS-3-75, even if the three-phase load is a delta load.
Test Limit The MXCTSH retains a database of harmonic current test limits. This setting selects the
limit set to use. Available options are European and Japanese. For normal IEC testing,
the European option should be selected.
Cycles per
window This option may be used to change the measurement window between 16 and 10 or 12
periods. The present standard requires the use of a 16 period acquisition window. Future
standards are in place for this to be 10 periods at 50 Hz and 12 periods at 60 Hz for a 200
msec at either line frequency. To meet the existing IEC 61000-3-12 standard, the 16
period acquisition window should be selected.
EUT This field may be used to enter information about the equipment under test. This field is
used to hold a default value.
Tested by This field may be used to enter operator information. This field is used to hold a default
value.
Comment Comment field for general use. This field is used to hold a default value.
Customer If the test is performed on behalf of a third party, information about the entity for which the
test is performed may be entered here. This field is used to hold a default value.
Test Margin Determines at what scale factor the harmonic test limits will be applied. For most
situations, this value should be set to 100 %. If testing is done for pre-compliance, setting
a lower margin will provide an extra margin of safety against system tolerances of different
test systems. This field is used to hold a default value.
Test Duration Enter the total test time. For Steady State Harmonics, the default test time is 1.0 minute.
For Transitory Harmonics, the default test time is 2.5 minutes. For flicker tests, the
default time is 10 minutes. Maximum test time is 1440 minutes or 24 hours. This field is
used to hold a default value.
Table 5-1: IEC Harmonics Setup Parameters